- skybox, image, horizontal/radial gradient

- multiple directional lights
- per-object materials (roughness & metalness)
- fixed reflectivity to 0.5
- update PhysicalMaterial from three.js to r134

- outlines visible and hidden parts of highlighted/selected groups
- add highlightStrength/selectStrength renderer params

- no default exports
- no named tuples

- int textures (webgl2)
- read into Int32Array (webgl2)
- fix ctx.parameters.maxDrawingBuffers (webgl1)
- support setting frag out type (webgl2)

- enable linear texture interpolation to actually do subpixel fetches...
- higher quality fxaa profile with edge exploration
- exposed parameters
- enable during temproal multi sampling

- Move to a separate branch while issues are fixed.

- better near/far clipping plane support
- use quality props in volume representations

- volume marking
- position iterator
- trilinear position/vertex color interpolation
- fix missing update on traceOnly param change

- variants: instance, pixel